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Automatic voltage-sharing bipolar Zeta DC-DC converter

An automatic voltage equalization and converter technology, which is applied to the conversion equipment using Cuk converters, the conversion of DC power input to DC power output, instruments, etc., can solve the problem that high-gain DC-DC converters cannot simultaneously generate high-gain dual Polarity voltage and other issues, to achieve the effect of low voltage stress and high input and output gain

Active Publication Date: 2021-04-30
CHINA THREE GORGES UNIV
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  • Description
  • Claims
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Problems solved by technology

[0003] In order to solve the problem that the existing non-isolated high-gain DC-DC converters cannot simultaneously generate high-gain bipolar voltages, the basic Cuk circuit of the present invention proposes an automatic voltage equalizing bipolar Zeta DC-DC converter. The converter consists of a basic Zeta converter and several gain extension units

Method used

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  • Automatic voltage-sharing bipolar Zeta DC-DC converter
  • Automatic voltage-sharing bipolar Zeta DC-DC converter
  • Automatic voltage-sharing bipolar Zeta DC-DC converter

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Embodiment Construction

[0040] Such as figure 2 Shown is the circuit topology diagram when the number of expansion units of the present invention m=1, n=2:

[0041] An automatic voltage equalizing bipolar Zeta DC-DC converter, the converter includes a DC input source, two loads, a basic Zeta converter, 1 same polarity expansion unit, 2 reverse polarity voltage expansion units . in:

[0042] A basic Zeta converter consists of two inductors L, L P1 , two capacitors C P11 、C P12 , a power switch S 1 , a diode D P1 . Its connection form is as follows: power switch S 1 The drain is connected to the positive pole of the input power supply, and the source is connected to one end of the inductor L and the capacitor C P11 One end of the capacitor C P11 The other end of the inductor L P1 one end of the diode D P1 connected to the cathode, the inductor L P1 The other end of the capacitor C P12 One end of the inductor L is connected, the other end of the inductor L, the diode D P1 anode and capac...

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Abstract

The invention discloses an automatic voltage-sharing bipolar Zeta DC-DC converter. The converter comprises a direct-current input source, a basic Zeta converter, m-1 homopolar expansion units and n reversed polarity voltage expansion units. Each of the homopolar and reversed polarity expansion units is composed of an inductor, two capacitors and a diode, and the input and output gain of the converter and the voltage stress of a switching device can be adjusted by adjusting the number of the expansion units. The converter provided by the invention has the advantages of simple control and drive circuit, wide input and output voltage adjustment range, low switching device voltage stress and the like, and is more suitable for the application occasions where positive and negative power supply output is needed and the input voltage and output voltage change range is large.

Description

technical field [0001] The invention relates to a DC-DC converter, in particular to an automatic voltage equalizing bipolar Zeta DC-DC converter. Background technique [0002] In applications where the input and output voltages vary greatly, the input voltage may be higher than the output voltage, or lower than the output voltage. The common non-isolated buck-boost DC-DC converters that are applicable at this time include Buck-Boost, Cuk, Sepic and Zeta circuits. Theoretically, by adjusting the duty cycle D, the input and output gains of these converters can vary from zero to infinity, but due to the influence of components and circuit parasitic parameters, the boosting capability of these converters is greatly limited. At present, most of the schemes for increasing the input and output gain of DC-DC converters are based on Boost circuits, so these circuits usually can only achieve voltage output with the same polarity or opposite polarity as that of the power supply at the...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M3/00
CPCH02M3/156H02M3/005
Inventor 邾玢鑫刘昱张耀李振华王灿
Owner CHINA THREE GORGES UNIV
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